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Molecular gas and star formation in the red-sequence counter-rotating disc galaxy NGC 4550
Alison F. Crocker, Hyunjin Jeong, Shinya Komugi +4
We present observations of the CO(1-0) emission in the central 750 pc (10 arcsec) of the counter-rotating disc galaxy NGC 4550, obtained at the Institut de Radioastronomie Millimet…
Interferometer observations of molecular gas in radio galaxies
S. Garcia-Burillo, F. Combes, A. Usero +1
We present the first results of a high-resolution study of the distribution and kinematics of molecular gas in two nearby radio galaxies, 4C31.04 and 3C293, representative of two d…
Dynamical Evolution of AGN Host Galaxies - Gas In/Out-Flow Rates in 7 NUGA Galaxies
Sebastian Haan, Eva Schinnerer, Eric Emsellem +4
To examine the role of the host galaxy structure in fueling nuclear activity, we estimated gas flow rates from several kpc down to the inner few 10 pc for seven nearby spiral galax…
New views on bar pattern speeds from the NUGA survey
V. Casasola, S. Garcia-Burillo, F. Combes +10
We present a review on bar pattern speeds from preliminary results in the context of the Nuclei of Galaxies (NUGA) project. The large variety of molecular circumnuclear morphologie…
Lopsided Spiral Galaxies
Chanda J. Jog, Francoise Combes
The light distribution in the disks of many galaxies is non-axisymmetric or `lopsided' with a spatial extent much larger along one half of a galaxy than the other, as in M101. Rece…
Molecular gas in NUclei of GAlaxies (NUGA). XI. A complete gravity torque map of NGC4579: new clues on bar evolution
S. Garcia-Burillo, S. Fernandez-Garcia, F. Combes +6
We create a complete gravity torque map of the disk of the LINER/Seyfert 1.9 galaxy NGC4579. We quantify the efficiency of angular momentum transport and search for signatures of s…
High-resolution molecular line observations of active galaxies
S. Garcia-Burillo, F. Combes, A. Usero +1
The study of the content, distribution and kinematics of interstellar gas is a key to understand the origin and maintenance of both starburst and nuclear (AGN) activity in galaxies…
The simulated 21 cm signal during the epoch of reionization : full modeling of the Ly-alpha pumping
S. Baek, P. Di Matteo, B. Semelin +2
The 21 cm emission of neutral hydrogen is the most promising probe of the epoch of reionization(EoR). In the next few years, the SKA pathfinders will provide statistical measuremen…
Search for cold gas along radio lobes in the cooling core galaxies MS0735.6+7421 and M87
P. Salomé, F. Combes
We report CO observations towards MS0735.6+7421 a distant cooling core galaxy, and towards M87, the nearest cooling core in the center of the Virgo cluster. Both galaxies contain r…
Gas flow models in the Milky Way embedded bars
Nemesio Rodriguez-Fernandez, Francoise Combes
The gas distribution and dynamics in the inner Galaxy present many unknowns as the origin of the asymmetry of the longitude-velocity (lv) diagram of the Central Molecular Zone (CMZ…
Molecular gas in nearby elliptical radio galaxies
B. Ocana-Flaquer, S. Leon, J. Lim +2
Powerful radio-AGN are hosted by massive elliptical galaxies which are usually very poor in molecular gas. Nevertheless the central Black Hole (BH) needs molecular gas for the nucl…
Evolution of spiral galaxies in modified gravity: II- Gas dynamics
O. Tiret, F. Combes
The stability of spiral galaxies is compared in modified Newtonian Dynamics (MOND) and Newtonian dynamics with dark matter (DM). We extend our previous simulations that involved pu…
The molecular polar disc in NGC 2768
Alison F. Crocker, Martin Bureau, Lisa M. Young +1
We present CO(1-0) and CO(2-1) maps of the molecular polar disc in the elliptical galaxy NGC 2768 obtained at the IRAM Plateau de Bure Interferometer. The maps have a resolution of…
Secular evolution of disk galaxies
F. Combes
Galaxy disks evolve through angular momentum transfers between sub-components, like gas, stars, or dark matter halos, through non axi-symmetric instabilities. The speed of this evo…
Dynamical Influence of Bars on the Star Formation in Isolated Galaxies
S. Verley, F. Combes, L. Verdes-Montenegro +2
Star formation depends strongly on both the local environment of galaxies and the internal dynamics of the interstellar medium. To disentangle the two effects, we obtained, in the…
A multi-transition HCN and HCO+ study of 12 nearby active galaxies: AGN versus SB environments
M. Krips, R. Neri, S. Garcia-Burillo +4
Recent studies have indicated that the HCN-to-CO(J=1-0) and HCO+-to-HCN(J=1-0) ratios are significantly different between galaxies with AGN (active galactic nucleus) and SB (starbu…
The NUGA project: The Seyfert 2 galaxy NGC3147
V. Casasola, F. Combes, S. Garcia-Burillo +3
We present CO(1-0) and CO(2-1) maps of the Seyfert 2 galaxy NGC3147 of the NUclei of GAlaxies (NUGA) sample at 1.8'' x 1.6'' and 1.4'' x 1.2'' resolution respectively. Identifying…
Formation of cold filaments in cooling flow clusters
Y. Revaz, F. Combes, P. Salome
Emission-lines in the form of filamentary structures is common in bright clusters characterized by short cooling times. In the Perseus cluster, cold molecular gas, tightly linked t…
Old stellar counter-rotating components in elliptical-spiral mergers: exploring the GalMer database
P. Di Matteo, F. Combes, A. -L. Melchior +1
We investigate, by means of numerical simulations, the kinematics of elliptical-spiral merger remnants. Counterrotation can appear both in coplanar and in non-coplanar retrograde m…
CO investigation of z=0.4-1.5 galaxies
A. -L. Melchior, F. Combes
We report on the results of an IRAM-30m search for CO emission lines in three galaxies at intermediate redshifts. The idea was to investigate the molecular content of galaxies brig…
Velocity dispersion around ellipticals in MOND
O. Tiret, F. Combes, G. W. Angus +2
We investigate how different models that have been proposed for solving the dark matter problem can fit the velocity dispersion observed around elliptical galaxies, on either a sma…
Atomic Hydrogen Properties of AGN Host Galaxies: HI in 16 NUclei of GAlaxies (NUGA) Sources
S. Haan, E. Schinnerer, C. G. Mundell +2
We present a comprehensive spectroscopic imaging survey of the distribution and kinematics of atomic hydrogen (HI) in 16 nearby spiral galaxies hosting low luminosity AGN, observed…
Old stellar counter-rotating components in early-type galaxies from elliptical-spiral mergers
P. Di Matteo, F. Combes, A. -L. Melchior +1
We investigate, by means of numerical simulations, the possibility of forming counter-rotating old stellar components by major mergers between an elliptical and a spiral galaxy. We…
Disk Growth in Bulge-Dominated Galaxies: Molecular Gas and Morphological Evolution
Lisa Young, Martin Bureau, Alison Crocker +1
Substantial numbers of morphologically regular early-type (elliptical and lenticular) galaxies contain molecular gas, and the quantities of gas are probably sufficient to explain r…